For two decades, the capacity factor of wind power measuring the mean energy delivered by wind turbines has been assumed at 35% of the name plate capacity. Yet, the mean realized value for Europe over the last five years is closer to 21% thus making levelized cost 66% higher than previously thought. We document this discrepancy and offer rationalizations, emphasizing the long term variations of wind speeds. We conclude with the consequences of the capacity factor miscalculation and some policy recommendations. Click on the link below to download the full document.

This document authored by Acoustic Ecology Institute provides a comprehensive overview of noise issues pertaining to utility-scale wind energy development. This AEI Special Report will be continually updated, incorporating new research, more recent reports, and suggestions/comments from readers. Planned topics to be added over time include: effects of noise on wildlife and habitat, offshore wind energy, and the health effects of chronic noise exposure.

In this letter to residents of Burke, NY, Dr. Nina Pierpont briefly discusses her findings of health impacts on families living in proximity to industrial-scale wind turbines.

This 12-month diary (January 2007 through December 2007) was compiled by Gail Mair. Mrs. Mair lives with her husband Walter in Tuscany, Italy. Gail (fluent in English, German, and Italian) and Walter (a native of Italy) bought this piece of property some years ago and, in October 2006, moved into the (modest) dream house they had just built. It was to be their retirement home. As construction on their new home was coming to an end, wind developer, Gamesa, was completing construction on its windfarm nearby. In November 2006, the turbines were turned on and the problems of noise were started -- Day after day, relentless, unending. Gail and Walter have asked that their diary be circulated widely, in the hope of saving other communities and individuals from the misery they are living through.

Mr. Schneider, a retired biologist from the New York State Department of Environmental Conservation and a 38-year resident of Cape Vincent, provided these compelling comments in response to Canadian Hydro Developers' environmental review report on the Wolfe Island wind project. The first page of his letter is provided below. The full text can be accessed by clicking on the link(s) at the bottom of this page.

This document compiled for Ontario electricity consumers provides an comprehensive explanation of the hidden-costs of industrial wind energy. It also directly addresses the question of whether wind power provides a meaningful reduction in carbon emissions.

This important collaborative document describes the current research on wind energy and the assessment of impacts on nocturnally active birds and bats.

North American Electric Reliability Corporation released this assessment of the reliability and adequacy of the bulk power system in North America for the next ten years.

This paper on Infrasound and Low Frequency Noise Dose Responses, was presented at the Inter-Noise 2007 conference held in Istanbul, Turkey August 28-31, 2007. The authors are Mariana Alves-Pereira and Nuno A. A. Castelo Branco of the Erisa-Universidade Lusofona, Lisbon, Portugal and the Center of Human Performance, Alverca, Portugal.

This paper on Infrasound and Low Frequency Noise Dose responses, was presented at the Inter-Noise 2007 conference held in Istanbul, Turkey August 28-31, 2007. The authors are Mariana Alves-Pereira and Nuno A. A. Castelo Branco of the Erisa-Universidade Lusofona, Lisbon, Portugal and the Center of Human Performance, Alverca, Portugal.